Method for continuously generating highly concentrated ozone gas

Abstract

A method for generating highly concentrated ozone gas by adsorbing ozone gas generated by an ozonizer with an absorbent within an adsorption column and then separating highly concentrated ozone gas from the adsorption column. Three adsorption columns are arranged in parallel. Each of the adsorption columns is controlled to repeat four steps of an ozone gas adsorbing step, a stabilizing and pressurizing step, an ozone gas desorbing step and a cooling down step. Each of the ozone gas adsorbing step and the ozone gas desorbing step has operation time set twice the operation time of each of the stabilizing and pressurizing step and the cooling down step. An ozone gas concentrating unit comprises three adsorption columns which are set to operate one after another by ⅓ cycle lag. Highly concentrated ozone gas separated at the desorbing step of each adsorption column is once stored in an ozone gas storage vessel.

What is claimed is:  
     
       1. A method for generating highly concentrated ozone gas which comprises adsorbing ozone gas generated by an ozonizer ( 8 ) with an adsorbent ( 1 ) within each of a plurality of adsorption columns ( 2 ) and supplying only highly concentrated ozone gas obtained by desorbing it from the adsorbent ( 1 ) to an ozone gas using installation, wherein 
       an ozone concentrating unit comprises three adsorption columns ( 2 ) arranged in parallel with each other and each filled with the adsorbent ( 1 ), in this unit each of the adsorption columns ( 2 ) being controlled so as to repeat four steps comprising an ozone gas adsorbing step, a stabilizing and pressurizing step, an ozone gas desorbing step and a cooling down step, each of the ozone gas adsorbing step and the ozone gas desorbing step having an operation time set twice the operation time of each of the stabilizing and pressurizing step and the cooling down step, the three adsorption columns ( 2 ) composing the ozone concentrating unit being set to operate consecutively by a ⅓ (one third) cycle lag, wherein the desorption step includes increasing the temperature of the adsorption column so as to increase the pressure therein and urging desorption of the ozone gas, said ozone gas only releasing from said absorbent as a result of the increase of temperature and pressure within said adsorption column, and  
       said method includes storing only highly concentrated ozone gas separated at the desorbing step of each adsorption column ( 2 ) in an ozone gas storage vessel ( 30 ), from which only the highly concentrated ozone gas is supplied to the ozone gas using installation after a flow controller ( 34 ) has regulated its flow amount to a constant one.  
     
     
       2. A method for concentrating ozone gas which comprises: cooling ozone gas adsorption columns ( 2 ) each filled with an ozone gas adsorbent ( 1 ); 
       supplying ozone gas generated by an ozonizer ( 8 ) to each adsorption column ( 2 ) so as to enable the adsorbent ( 1 ) within each adsorption column ( 2 ) to effect an ozone gas saturation adsorption; and  
       reducing an inner pressure of each adsorption column ( 2 ) by decreasing only the temperature of said adsorption column while maintaining said ozone gas therein, said temperature of said adsorption column during cooling being decreased by a cooling jacket surrounding said adsorption column and having a liquid cooling fluid circulating therethrough.  
     
     
       3. The method as set forth in  claim 2  which comprises reducing the inner pressure of each ozone gas adsorption column ( 2 ) to not more than a partial pressure of the supplied ozone gas.